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Luo Z, Lv S, Lou F, Yan L, Xu J, Kang N, Dong Y, Jin X. Roles of intralesional bacteria in the initiation and progression of oral squamous cell carcinoma. Cancer Med 2024; 13:e70209. [PMID: 39300932 PMCID: PMC11413416 DOI: 10.1002/cam4.70209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2024] [Accepted: 08/26/2024] [Indexed: 09/22/2024] Open
Abstract
BACKGROUND Oral squamous cell carcinoma (OSCC) is the predominant form of head and neck cancer, often diagnosed at late stages, resulting in a poor prognosis. Recent studies indicate a potential association between OSCC and microbial presence. Microorganisms have been identified in various tumors and lesions, including OSCC and oral potentially malignant disorders (OPMDs). Intralesional microbiota are considered important components of the tumor microenvironment (TME) and may contribute to carcinogenesis. METHODS Sources were collected through thorough searches of databases PubMed and Embase. The review focused on microbial characteristics, potential origins, and their impact on cancer progression. RESULTS Bacteria display varying abundance and diversity throughout the stages of OSCC and OPMDs. Intraleisional bacteria may have diverse sources, including not only oral plaque and saliva but also potentially the gut. Intralesional bacteria have both pro-carcinogenic and anti-carcinogenic effects, affecting processes like cell proliferation, invasion, and immune response. CONCLUSIONS Intralesional microbiota are crucial in OSCC and OPMDs, influencing both disease progression and treatments. Despite their significance, challenges like inconsistent sampling and microbial identification remain. Future research is required to fully understand their role and improve clinical applications.
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Affiliation(s)
- Zhuoyan Luo
- College of StomatologyChongqing Medical UniversityChongqingChina
- Chongqing Key Laboratory of Oral DiseasesChongqingChina
| | - Shiping Lv
- College of StomatologyChongqing Medical UniversityChongqingChina
- Chongqing Key Laboratory of Oral DiseasesChongqingChina
| | - Fangzhi Lou
- College of StomatologyChongqing Medical UniversityChongqingChina
- Chongqing Key Laboratory of Oral DiseasesChongqingChina
| | - Li Yan
- College of Medical InformaticsChongqing Medical UniversityChongqingChina
| | - Jingyi Xu
- College of StomatologyChongqing Medical UniversityChongqingChina
- Chongqing Key Laboratory of Oral DiseasesChongqingChina
| | - Ning Kang
- College of StomatologyChongqing Medical UniversityChongqingChina
- Chongqing Key Laboratory of Oral DiseasesChongqingChina
| | - Yunmei Dong
- College of StomatologyChongqing Medical UniversityChongqingChina
- Chongqing Key Laboratory of Oral DiseasesChongqingChina
| | - Xin Jin
- College of StomatologyChongqing Medical UniversityChongqingChina
- Chongqing Key Laboratory of Oral DiseasesChongqingChina
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Girija ASS. Acinetobacter baumannii as an oro-dental pathogen: a red alert!! J Appl Oral Sci 2024; 32:e20230382. [PMID: 38747806 PMCID: PMC11090480 DOI: 10.1590/1678-7757-2023-0382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Accepted: 03/01/2024] [Indexed: 05/19/2024] Open
Abstract
OBJECTIVES This review highlights the existence and association of Acinetobacter baumannii with the oro-dental diseases, transforming this systemic pathogen into an oral pathogen. The review also hypothesizes possible reasons for the categorization of this pathogen as code blue due to its stealthy entry into the oral cavity. METHODOLOGY Study data were retrieved from various search engines reporting specifically on the association of A. baumannii in dental diseases and tray set-ups. Articles were also examined regarding obtained outcomes on A. baumannii biofilm formation, iron acquisitions, magnitude of antimicrobial resistance, and its role in the oral cancers. RESULTS A. baumannii is associated with the oro-dental diseases and various virulence factors attribute for the establishment and progression of oro-mucosal infections. Its presence in the oral cavity is frequent in oral microbiomes, conditions of impaired host immunity, age related illnesses, and hospitalized individuals. Many sources also contribute for its prevalence in the dental health care environment and the presence of drug resistant traits is also observed. Its association with oral cancers and oral squamous cell carcinoma is also evident. CONCLUSIONS The review calls for awareness on the emergence of A. baumannii in dental clinics and for the need for educational programs to monitor and control the sudden outbreaks of such virulent and resistant traits in the dental health care settings.
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Affiliation(s)
- A S Smiline Girija
- Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha Dental College and Hospitals, Department of Microbiology, Chennai-600077, Tamilnadu, India
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Yeo K, Li R, Wu F, Bouras G, Mai LTH, Smith E, Wormald PJ, Valentine R, Psaltis AJ, Vreugde S, Fenix K. Identification of consensus head and neck cancer-associated microbiota signatures: a systematic review and meta-analysis of 16S rRNA and The Cancer Microbiome Atlas datasets. J Med Microbiol 2024; 73. [PMID: 38299619 DOI: 10.1099/jmm.0.001799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2024] Open
Abstract
Introduction. Multiple reports have attempted to describe the tumour microbiota in head and neck cancer (HNSC).Gap statement. However, these have failed to produce a consistent microbiota signature, which may undermine understanding the importance of bacterial-mediated effects in HNSC.Aim. The aim of this study is to consolidate these datasets and identify a consensus microbiota signature in HNSC.Methodology. We analysed 12 published HNSC 16S rRNA microbial datasets collected from cancer, cancer-adjacent and non-cancer tissues to generate a consensus microbiota signature. These signatures were then validated using The Cancer Microbiome Atlas (TCMA) database and correlated with the tumour microenvironment phenotypes and patient's clinical outcome.Results. We identified a consensus microbial signature at the genus level to differentiate between HNSC sample types, with cancer and cancer-adjacent tissues sharing more similarity than non-cancer tissues. Univariate analysis on 16S rRNA datasets identified significant differences in the abundance of 34 bacterial genera among the tissue types. Paired cancer and cancer-adjacent tissue analyses in 16S rRNA and TCMA datasets identified increased abundance in Fusobacterium in cancer tissues and decreased abundance of Atopobium, Rothia and Actinomyces in cancer-adjacent tissues. Furthermore, these bacteria were associated with different tumour microenvironment phenotypes. Notably, high Fusobacterium signature was associated with high neutrophil (r=0.37, P<0.0001), angiogenesis (r=0.38, P<0.0001) and granulocyte signatures (r=0.38, P<0.0001) and better overall patient survival [continuous: HR 0.8482, 95 % confidence interval (CI) 0.7758-0.9273, P=0.0003].Conclusion. Our meta-analysis demonstrates a consensus microbiota signature for HNSC, highlighting its potential importance in this disease.
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Affiliation(s)
- Kenny Yeo
- Discipline of Surgery, Adelaide Medical School, The University of Adelaide, Adelaide SA, 5000, Australia
- Department of Surgery- Otolaryngology Head and Neck Surgery, The University of Adelaide and the Basil Hetzel Institute for Translational Health Research, Central Adelaide Local Health Network, Woodville South SA, 5011, Australia
| | - Runhao Li
- Discipline of Surgery, Adelaide Medical School, The University of Adelaide, Adelaide SA, 5000, Australia
- Department of Haematology and Oncology, Basil Hetzel Institute for Translational Health Research and The Queen Elizabeth Hospital, Central Adelaide Local Health Network, Woodville South SA, 5011, Australia
| | - Fangmeinuo Wu
- Discipline of Surgery, Adelaide Medical School, The University of Adelaide, Adelaide SA, 5000, Australia
- Department of Haematology and Oncology, Basil Hetzel Institute for Translational Health Research and The Queen Elizabeth Hospital, Central Adelaide Local Health Network, Woodville South SA, 5011, Australia
| | - George Bouras
- Department of Surgery- Otolaryngology Head and Neck Surgery, The University of Adelaide and the Basil Hetzel Institute for Translational Health Research, Central Adelaide Local Health Network, Woodville South SA, 5011, Australia
| | - Linh T H Mai
- Discipline of Surgery, Adelaide Medical School, The University of Adelaide, Adelaide SA, 5000, Australia
- Department of Surgery- Otolaryngology Head and Neck Surgery, The University of Adelaide and the Basil Hetzel Institute for Translational Health Research, Central Adelaide Local Health Network, Woodville South SA, 5011, Australia
| | - Eric Smith
- Discipline of Surgery, Adelaide Medical School, The University of Adelaide, Adelaide SA, 5000, Australia
- Department of Haematology and Oncology, Basil Hetzel Institute for Translational Health Research and The Queen Elizabeth Hospital, Central Adelaide Local Health Network, Woodville South SA, 5011, Australia
| | - Peter-John Wormald
- Discipline of Surgery, Adelaide Medical School, The University of Adelaide, Adelaide SA, 5000, Australia
- Department of Surgery- Otolaryngology Head and Neck Surgery, The University of Adelaide and the Basil Hetzel Institute for Translational Health Research, Central Adelaide Local Health Network, Woodville South SA, 5011, Australia
| | - Rowan Valentine
- Department of Surgery- Otolaryngology Head and Neck Surgery, The University of Adelaide and the Basil Hetzel Institute for Translational Health Research, Central Adelaide Local Health Network, Woodville South SA, 5011, Australia
| | - Alkis James Psaltis
- Discipline of Surgery, Adelaide Medical School, The University of Adelaide, Adelaide SA, 5000, Australia
- Department of Surgery- Otolaryngology Head and Neck Surgery, The University of Adelaide and the Basil Hetzel Institute for Translational Health Research, Central Adelaide Local Health Network, Woodville South SA, 5011, Australia
| | - Sarah Vreugde
- Discipline of Surgery, Adelaide Medical School, The University of Adelaide, Adelaide SA, 5000, Australia
- Department of Surgery- Otolaryngology Head and Neck Surgery, The University of Adelaide and the Basil Hetzel Institute for Translational Health Research, Central Adelaide Local Health Network, Woodville South SA, 5011, Australia
| | - Kevin Fenix
- Discipline of Surgery, Adelaide Medical School, The University of Adelaide, Adelaide SA, 5000, Australia
- Department of Surgery- Otolaryngology Head and Neck Surgery, The University of Adelaide and the Basil Hetzel Institute for Translational Health Research, Central Adelaide Local Health Network, Woodville South SA, 5011, Australia
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